package com.example.forum.services.impl;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.dao.ArticleMapper;
import com.example.forum.exception.ApplicationException;
import com.example.forum.model.Article;
import com.example.forum.model.Board;
import com.example.forum.model.User;
import com.example.forum.services.IArticleService;
import com.example.forum.utils.StringUtil;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

@Slf4j
@Service
public class ArticleServiceImpl implements IArticleService {

    @Resource
    private ArticleMapper articleMapper;
    //用户和板块的操作
    @Resource
    private BoardServiceImpl boardService;
    @Resource
    private UserServiceImpl userService;

    @Override
    public void create(Article article) {
        //非空校验
         if (article == null || article.getUserId() == null || article.getBoardId() == null
                 || StringUtil.isEmpty(article.getTitle()) || StringUtil.isEmpty(article.getContent())) {
             log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
             throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
         }
         //设置默认值
        article.setVisitCount(0);  //访问数
        article.setReplyCount(0);  //回复数
        article.setLikeCount(0);  //点赞数
        article.setDeleteState((byte) 0);
        article.setState((byte) 0);
        Date date = new Date();
        article.setCreateTime(date);
        article.setUpdateTime(date);
        //写入数据库
        int articleRow = articleMapper.insertSelective(article);
        if (articleRow <= 0) {
            log.warn(ResultCode.FAILED_CREATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }

        //获取用户发帖数
        User user = userService.selectById(article.getUserId());
        //未找到指定用户信息
        if (user == null) {
            log.warn(ResultCode.FAILED_CREATE.toString() + "发帖失败，user id " + article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }

        //更新用户发帖数
        userService.addOneArticleCountById(user.getId());

        //获取板块信息
        Board board = boardService.selectById(article.getBoardId());

        if (board == null) {
            log.warn(ResultCode.FAILED_CREATE.toString() + "发帖失败，board id " + article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }

        //更新板块发帖数
        boardService.addOneArticleCountById(board.getId());

        //打印日志
        log.info(ResultCode.SUCCESS.toString() + ", user id =" + article.getUserId()
                + ", board id = " + article.getBoardId() + ", article id = " + article.getId() +
                "发贴成功");
    }

    @Override
    public List<Article> selectAll() {
        List<Article> articles = articleMapper.selectAll();
        return articles;
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
        //非空校验
        if (boardId == null || boardId <= 0) {
             log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
             throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //检查版块是否存在
        Board board = boardService.selectById(boardId);
        if (board == null) {
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString() + "board id " + boardId);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        List<Article> articles = articleMapper.selectAllByBoardId(boardId);

        return articles;
    }

    @Override
    public List<Article> selectByUserId(Long userId) {
        //非空校验
        if (userId == null || userId <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        User user = userService.selectById(userId);
        if (user == null) {
            log.warn(ResultCode.FAILED_USER_NOT_EXISTS.toString() + "user id " + userId);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        List<Article> articles = articleMapper.selectByUserId(userId);
        return articles;
    }

    public Article selectDetailById( Long id) {
        if (id == null || id < 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectDetailById(id);
        if (article == null) {
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        //更新帖子的访问时
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount()+1);
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        //返回帖子详情
        article.setVisitCount(article.getVisitCount()+1);
        return article;
    }

    @Override
    public Article selectById(Long id) {
        if (id == null || id < 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        return article;
    }

    @Override
    public void modify(Long id, String title, String content) {
        //非空校验
        if (id ==  null || id <= 0 || StringUtil.isEmpty(title) || StringUtil.isEmpty(content)) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //构建要更新的帖子对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setTitle(title);
        updateArticle.setContent(content);
        updateArticle.setUpdateTime(new Date());

        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }

    }

    @Override
    public void thumbsUpById(Long id) {
        //非空校验
        if (id ==  null || id <= 0 ) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //获取帖子详情
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        if (article.getState() == 1 ) {
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        //构建要更新的帖子对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setLikeCount(article.getLikeCount()+1);
        updateArticle.setUpdateTime(new Date());

        //调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void deleteById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString()+",article id " + article.getId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }

        //构造要更新的帖子对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte) 1);

        //调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }

        userService.subOneArticleCountById(article.getUserId());
        boardService.subOneArticleCountById(article.getBoardId());

        log.info("删除帖子成功, article id = " + article.getId() + ", user id = " + article.getUserId());
    }

    @Override
    public void addOneReplyCountById(Long id) {
        //非空校验
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString()+",article id " + article.getId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        //帖子状态异常，封贴
        if (article.getState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString()+",article id " + article.getId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        //构造要更新的对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setReplyCount(article.getReplyCount()+1);

        //调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

}
